Method of production of solid fuel briquettes

FIELD: production of solid carbonaceous fuel.

SUBSTANCE: the invention is pertaining to the method of production of solid fuel briquettes and may be used at enterprises producing a household fuel. The method provides for mixing of slack coal (sludge cake) with the diameter of fragments of 0.05-0 mm with a mass share a moisture of 16-17 % and with 5 % (23-34 %) of water solution of a cationic polyelectrolyte, compaction of a charge mixture by a hydraulic press at the pressure of 340 kg/cm2 and the thermal treatment at the temperature of t=150°C within 30 minutes. The invention allows to reduce pollutants emissions into the aerosphere at incineration of the solid fuel briquettes that reduces the negative effect on the natural environment and also to exclude the usage of an expensive undersized coke.

EFFECT: the invention ensures reduction of the contaminants emissions into the aerosphere at incineration of the solid fuel briquettes and reduction of the negative effect on the natural environment and also to exclude the usage of the expensive undersized coke.

3 tbl

 

The invention relates to the production of solid carbon-containing fuel, in particular for the manufacture of household fuel briquettes method of briquetting coal fines (cake)obtained during purification of mine waters at a press filter, and can also be used in the briquetting other coals thin class.

There is a method of briquetting coal slurries together with coal fines by the RF patent №2078794, IPC With 10 L 5/20, publ. 1997, which is used as a binder 5% powder lignosulfonate and to the mixture is added 30% dropout coal.

The disadvantages of this method:

- when burning briquettes containing lignosulfonate, in the atmosphere additionally allocated sulfur dioxide (SO2)as part of the lignosulfonate has alphagraph;

- preparation of the mixture occurs in three stages, including heating the mixture to 60°C;

- in the blend contains 30% costly screening of coal, which increases the cost of the briquettes.

Famous adopted for the prototype "Method of producing fuel briquettes" application No. 95102684, IPC With 10 L 5/20 (publ. 11.20.1996 g)comprising a mixture of fine coal, which is pre-dried to a moisture content of 1-1 .5% and pictires with an aqueous solution of sodium lignosulphonate concentration 53-55% in the ratio, wt.%: of sodium lignosulphonate 10 to 20, the steel - coal. After briquetting is carried out by drying the obtained briquettes.

The disadvantages of this method:

the method includes a step of pre-drying of fine coal to 1-1 .5%, which affects the cost of production;

- briquettes contain lignosulfonate that the combustion of the briquettes provides release into the atmosphere of sulfur dioxide (SO2)as part of the lignosulfonate has alphagraph;

The technical result of the proposed method is to eliminate the disadvantages of the above methods:

- reduction of emissions of pollutants into the atmosphere when burning briquettes and negative impact on the natural environment;

- an exception to the use of expensive screening coal to reduce the cost of briquettes.

The technical result is achieved by a method of producing fuel briquettes, comprising a mixture of fine coal with a liquid binder, molding the mixture and heat treatment, characterized in that mix cake with particle diameters -0,05-0 mm, with a mass fraction of moisture 16-17% 5% (23-34)% aqueous solution of cationic polyelectrolyte VPK-402, after which the mixture is pressed in a hydraulic press at a pressure of 340 kg/cm2and subjected to heat treatment at t=150°C for 30 minutes.

Cationic polyelectrolyte VPK-402 having the empirical formulaciji C 8H16NCl, is highly soluble in water and in aqueous solutions of acids and alkalis (table 1, 2). Cationic polyelectrolyte VPK-402 is used as a flocculant for intensification of processes of wastewater treatment in the oil and gas, mining and utilities sector, as well as to protect and structuring soil (TU 6-05-2009-238-86).

Table 1

Chemical properties of polyelectrolyte VPK-402 (commercial product)
No.IndicatorsThe content of the component
1The appearance of producthomogeneous liquid colourless to yellow without foreign inclusions
2Mass fraction of main content25
3Mass fraction of sodium chloride, %, max10
4Viscosity, mm2/C/NT), not less than2
5PH, PH5-8

Table 2

Physical properties of polyelectrolyte VPK-402 (aqueous solutions)
No.When the mass fraction30%40%
1Density at t=20°C, kg/m3110011401170
2Dynamic viscosity, PA-s, at t=20°1,879.846,4
3Pour point, °-17-18-20
4Specific heat, j/kg·335230482933

The use of cationic polyelectrolyte VPK-402 allows to significantly reduce the sulfur content in the briquette.

The method is as follows

Fine coal particles (KEK) with diameter d=-0,05-0 mm, with a mass fraction of moisture 16-17% was mixed with 5% 25-34% aqueous solution of cationic polyelectrolyte VPK-402. The resulting mixture was pressed on a hydraulic press and subjected to subsequent thermal treatment at t=150°C for 30 minutes. The sulfur content in the briquette does not exceed 0.48 per cent (table 3).

The advantages of the proposed method of producing fuel briquettes compared with prototype:

the atmosphere during the combustion of the briquettes do not receive additional hazardous substances;

during the preparation of the charge is not used costly fines coal;

- preparation of the mixture is held at one with adieu, there is no need of heating up to 60°C;

the sulfur content in the briquette 1.9 times less;

- the cost of briquettes below.

Thus, the inventive method of producing fuel briquettes allows to avoid additional emissions of harmful substances into the atmosphere when burning briquettes and thus reduce the negative impact on the environment.

Method of producing fuel briquettes, comprising a mixture of fine coal with a liquid binder, molding the mixture and heat treatment, characterized in that mix cake with particle diameters -0,05-0 mm, with a mass fraction of moisture 16-17% 5% (23-34%) aqueous solution of cationic polyelectrolyte VPK-402, after which the mixture is pressed in a hydraulic press at a pressure of 340 kg/cm2and subjected to heat treatment at a temperature equal to 150°C for 30 minutes



 

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FIELD: production of solid carbonaceous fuel.

SUBSTANCE: the invention is pertaining to the method of production of solid fuel briquettes and may be used at enterprises producing a household fuel. The method provides for mixing of slack coal (sludge cake) with the diameter of fragments of 0.05-0 mm with a mass share a moisture of 16-17 % and with 5 % (23-34 %) of water solution of a cationic polyelectrolyte, compaction of a charge mixture by a hydraulic press at the pressure of 340 kg/cm2 and the thermal treatment at the temperature of t=150°C within 30 minutes. The invention allows to reduce pollutants emissions into the aerosphere at incineration of the solid fuel briquettes that reduces the negative effect on the natural environment and also to exclude the usage of an expensive undersized coke.

EFFECT: the invention ensures reduction of the contaminants emissions into the aerosphere at incineration of the solid fuel briquettes and reduction of the negative effect on the natural environment and also to exclude the usage of the expensive undersized coke.

3 tbl

FIELD: shaped solid fuels.

SUBSTANCE: invention relates to fabrication of solid fuels for use in metallurgy, construction, and other industries as well as in heating systems. Fabrication involves dispensing coal fines, binder, and hardener. Binder is urea-formaldehyde resin with urea-to-formaldehyde molar ratio from 1:0.95 to 1:1.5 used in amount 5-15% of the weight of coal fines and hardener is in the form of acids, salts and solutions thereof reducing pH value of resin by 2-4 units and used in amount 0.01-1.0% of the weight of coal fines. According to first option, coal fines are first mixed with hardener during 10 to 120 sec, after which urea-formaldehyde resin is added and the total is stirred for 20 to 160 sec. Resulting mix is molded into briquettes and compacted. According to second option, coal fines are mixed with resin during 10-60 sec and, after addition of hardener, duration of mixing is 10-120 sec.

EFFECT: substantially simplified fabrication of strong, heat-resistant, and low-toxic fuel briquette and reduced power consumption.

4 cl, 2 tbl

FIELD: alternate solid fuels.

SUBSTANCE: invention relates to the field of solid fuel briquettes mainly consisting of carbon-containing materials fabricated with the aid of organic or mineral binder. Method of invention comprises breaking coal, binder, and catalyst (alkali metal salts) to particle size not larger than 100 μm, mixing them with water, briquetting, and drying briquettes. According to invention, coal is preliminarily baked under anaerobic conditions at temperature not exceeding 1000°C and liquid component is prepared by first mixing broken binder (5-25%) and catalyst (3-20%) with water (60-90%) and thus prepared mix is further mixed with crushed coal at weight ratio (60-90):(15-35). Fuel briquette itself is also disclosed containing 14-28% water, 3-8% binder reduced to particle size not larger than 100 μm, 1-5% catalyst, and baked coal. As a result, compression strength and resistance to abrasion of fuel briquettes are increased by 1.2 and 1.5 times, respectively.

EFFECT: increased strength of briquettes and achieved flameless burning thereof.

16 cl, 3 dwg, 10 ex

Method of moulding // 2456332

FIELD: process engineering.

SUBSTANCE: proposed method comprises first stage whereat mix is heated to required moulding temperature and second stage whereat said mix is mixed with binding agent in closed conditions. Note here that second stage working pressure is lower than that of the first stage. Mix features grain size varying from 0.01 to 5 mm, in particular, to 1 mm. Thereafter, next technological stages are performed.

EFFECT: ruled out harmful emissions.

FIELD: heating.

SUBSTANCE: invention relates to a charge containing bituminous coal and binding additives; bituminous coal contains an unburnt ash-slag mixture as a result of coal combustion in boiler houses, at thermal power plants, in domestic stoves, coal benefication wastes, and the following is used as activators: coal-tar resin, resinous wastes of coke-chemical and chemical industry, waste machine oils; aluminium powder in the amount of 1-3 vol % is used as a high-calorific additive, and lime in the amount of 13-18 vol % is used as a binding agent. The invention also relates to a manufacturing method of fuel briquettes from a charge, which involves crushing and mixing of charge components; after mixing is completed, water separation, mixture extrusion, and briquette drying and packaging is performed.

EFFECT: improvement of ecology, economical efficiency of bituminous coal processing, reduction of quantity of wastes and increase of heat amount at coal combustion.

2 cl, 1 tbl

FIELD: metallurgy.

SUBSTANCE: invention describes the method for producing the metallurgical briquette and comprises mixing the raw materials-carbon-containing material, a binder and water, pressing the briquette mixture and drying the moulded briquette. As a binding agent, a two-component binder containing resin and flour in ratio from 0.5:1 to 2:1 is used, where the starting components are taken in the following ratio, wt %: carbon-containing material-at least 50; bicomponent binder-8-40; the rest is water with temperature from 1 to 99°C.

EFFECT: production of briquette having high strength and low water absorption.

3 cl, 3 ex

FIELD: production of solid carbonaceous fuel.

SUBSTANCE: the invention is pertaining to the method of production of solid fuel briquettes and may be used at enterprises producing a household fuel. The method provides for mixing of slack coal (sludge cake) with the diameter of fragments of 0.05-0 mm with a mass share a moisture of 16-17 % and with 5 % (23-34 %) of water solution of a cationic polyelectrolyte, compaction of a charge mixture by a hydraulic press at the pressure of 340 kg/cm2 and the thermal treatment at the temperature of t=150°C within 30 minutes. The invention allows to reduce pollutants emissions into the aerosphere at incineration of the solid fuel briquettes that reduces the negative effect on the natural environment and also to exclude the usage of an expensive undersized coke.

EFFECT: the invention ensures reduction of the contaminants emissions into the aerosphere at incineration of the solid fuel briquettes and reduction of the negative effect on the natural environment and also to exclude the usage of the expensive undersized coke.

3 tbl

FIELD: solid fuel technology.

SUBSTANCE: invention is designed for application in production of solid fuel in metallurgy and for domestic necessities. Method of restoring sieve composition of coke comprises mixing off-grad coke with binder, such as various cement brands and Portland cement, moistening, briquetting of mix followed by heat treatment, and cooling. Off-grad coke utilized is coke fines fraction 0-10 mm and/or coke nut fraction 10-25 mm belonging to a certain types, which are mixed with binder at ratio (60-95):(5-40), respectively. Moistening is provided by adding water to 35% based on the weight of mix. Heat treatment is effected with steam. Cooling proceeds at ambient temperature to residual moisture content 5%. Mix is completed with filler in the form of organic or inorganic naturally occurring or man-made substances. Briquetting is effected on either vibration or press equipment. Coke briquette contains 60 to 95% of above-defined off-grade coke and 5 to 40 % of binder. Size of thus manufactured briquettes corresponds to required sieve composition of coke.

EFFECT: enabled full restoration of all fractions of needless process coke residues to useful sieve composition appropriate for fabrication of environmentally safe briquettes with improved consumer's properties without considerable investments.

8 cl, 1 tbl, 6 ex

FIELD: manufacture of building materials.

SUBSTANCE: invention relates to manufacture of molded fuel, in particular to fabrication of high-carbon fuel briquettes, which can be used when smelting cast iron in cupola-furnaces, when producing calcium carbide, silicon carbide, mineral fibers, and other materials. Process according to invention comprises mixing ground solid fuel with binder in amount 5-9% of the weight of ground solid fuel and briquetting mix followed by heat treatment of briquettes. Ground solid fuel is composed of coke fines with particle size 0.05-16.0 mm, 50-80%, and thermoantracite fines with particle size 0.05-6.0 mm, 20-50%. Binder is lignosulfonates modified with 3-5% of petroleum or petroleum products. Briquetting of mix is effected under pressure 25 MPa.

EFFECT: reduced power consumption, investment and operational expenses, increased briquette fabrication productivity, and increased strength, heat resistance, and calorific value of fuel briquettes.

3 ex

FIELD: chemistry.

SUBSTANCE: method involves thermal treatment of low-grade fuel at temperature 200-500°C. A pyrolysis product is obtained - low-temperature pyrolysis resin and a carbon residue. The carbon residue is crushed and mixed with low-temperature pyrolysis resin in equal parts. Briquettes are moulded from the obtained mixture. The briquettes are dried at temperature not higher than 200°C. The obtained fuel briquettes are left to solidify at room temperature for one day.

EFFECT: minimising processing equipment used.

1 cl, 5 ex, 1 dwg

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